Self-dumping scow



June 4, 1935. J. K. MUNSON 2,003,694

SELF DUMPING s'cow Filed Aug. 15, 1953 Patented June 4, 1935 UNITEDSTATES PATENT OFFICE SELF-DUMPING SCOW John Kimball Munson, Olympia,Wash. I

Application August 15,

3 Claims.

This invention relates to a self-dumping scow, and it is primarily anobject of the invention to provide means whereby as a result of floodingthe scow may be caused to turn over bottom up to discharge the cargo,wash its deck and return to normal upright position on an even keelready for another load. 7

The invention consists in the details of construction and in thecombination and arrangement-of the several parts of my improvedselfdumping scow whereby certain important advantages are attained andthe device rendered simpler, less expensive and otherwise moreconvenient and advantageous for use, as will be hereinafter more fullyset forth.

The novel features of my invention will hereinafter be definitelyclaimed.

In order that my invention may be the better understood, I will nowproceed to describe the same with reference to the; accompanyingdrawing, Wherein:-

Figure l is a view in top plan of a scow constructed in accordance withan embodiment of my invention;

Figure 2 is a view partly in side'elevation and partly in sectionofthescow as illustrated in Figure l;

Figure 3 is a transverse sectional view taken substantially on the line33 of Figure 1;

Figure 4 is a view inenduelevation with a portion broken away of thescow nearly bottom up.

As disclosed in the accompanying drawing, my improved scow comprises anupper deck I and an inner deck 2 extending from one end to the other ofthe scow and spaced from the bottom 3 to position said lower deck'Zslightly above the no-load water line of the scow. The opposite endportions of the scow are preferably upwardly rounded as illustrated inthe accompanying drawings, and the upper deck I at its opposite endportions and at the transverse center of the scow is provided with theupstanding air tanks 4 and said upper deck I at opposite sides of eachof the tanks 4 is further provided with hatches 5. Between the air tanks4 the upper deck I is provided with a cargo space 6 defined by theupstanding enclosing walls 1. This top cargo space 6 also extendssubstantially from one tank 4 to the other and is disposed laterallyequal distances beyond the transverse center of the scow.

Depending from the top deck I and spaced from the side walls 8 of thescow are the panels 9 for trapping water between said panels and theside walls 8 of the scow as hereinafter to be more particularly referredto. The side walls 8 adjacent to the opposite ends thereof have disposedtherethrough the flood lines It), the outer or reduction ends of whichbeing above 1933, Serial No; 685,215

line sections H adjustable from a substantially horizontal position to asubstantially vertical position. As is illustrated in the accompanyingdrawing, each of the sections ll carries. an arm it? which isconnected'by a lever M or the like with a crank l5 carried by the lowerportion of a vertically disposed shaft Hi. This shaft l5 extends abovethe upper deck I and carries an operating crank I! or other memberwhereby the shaft l6 may be rotated in required-direction to eitherraise or lower the pipe or: line section I I. As is particularlyillustrated in Figure 2, each of the pipe or line sections 'II is of alength to extend up through a hatchwayi when said pipe or line sectionis raised to its substantially vertically disposed position.

The space 6 is loaded as desired anda lineis aged with each of theoperating members I] adapted to lead to a tug boat orother point so thatupon pulling on such line or lines the sections I I may be lowered tosubstantially horizontal positions, thus allowing the sea water to,enter between the decks l and 2 to floor the compartment therebetween.This lowering of the sections l I occurs of course after the scow hasbeen transported to a desired point of discharge and byjuse of the lineshereinbefore mentioned -it will heap parent that the desired dumpingaction may be efiected without an attendant being on the scow.

As the compartment of the scow floods the scow is caused to settledownwardly into the sea from the weight on the load space 6. Beingunable to maintain its balance, the scow lists to one side or the otherand as the water continues to enter through the pipe lines It at oneside thereof, the top load or cargo will carry the scow over and bottomup. As this load is prevented from sliding by the walls I, the air tanks4 will be forced under the water before a complete discharge of the loador cargo is obtained. This action also assures the sea water washing thetop deck after the discharge of the load.

In rolling over, the flood water is trapped in an enclosure or spacebetween a panel 9 and a side wall 8 of the scow which causes the scow torollback in the opposite direction and with the upward force or pull ofthe tanks 4 together with the action of the water continuing to run intothe compartment, the scow sinks lower and rolls back deck upward bybuoyancy of the chamber l8 between the inner deck 2 and the bottom 3 ofthe scow. The water will then run out the lower lines I0 until thecompartment between the decks land 2 is free from water and the scowuprighted.

From the foregoing description it is thought to be obvious that aself-dumping scow constructed in accordance with my invention isparticularly well adapted for use by reason of the convenience andfacility with which it may be assembled and operated, and it will alsobe obvious that my invention is susceptible of some change andmodification without departing from the principles and spirit thereofand for this reason I do not wish to be understood as limiting myself tothe precise arrangement and formation of the several parts herein shownin carrying out my invention in practice except as hereinafter claimed.

I claim:

1. A self-dumping scow having a top deck and a bottom, an inner deckwithin the scow extending from one end to the other and spaced from thebottom of the scow to position said lower deck slightly above theno-load water line of the scow, an upstanding enclosure carried by thetop deck to provide a top cargo space, air tanks mounted upon the topdeck fore and aft of the enclosure, panels depending from the top deckand spaced from the side walls of the scow to provide pockets to catchwater as the scow rolls over to an inverted position, said panelsterminating at a point substantially midway between the top deck and theinner deck, and flood lines mounted upon the inner deck at oppositesides of the scow and adjacent to the opposite ends thereof, said floodlines having their induction ends above the water line when the scow issubstantially free of load, said flood lines having swinging sectionswithin the scow adjustable from a substantially horizontal position to asubstantially vertical position and means for swinging said sections,said air tanks being aligned lengthwise of the scow and positionedsubstantially at the. transverse center thereof. I

2. A self-dumping scow having a top deck and a bottom, an inner deckwithin the scow extending from one end to the other and spaced from thebottom of the scow to position said lower deck slightly above theno-load water line of the scow, an upstanding enclosure carried by thetop deck to provide a top cargo space, an tanks mounted upon the topdeck fore and aft of the enclosure, panels depending from the top deckand spaced from the side walls of the scow to provide pockets to catchwater as the scow rolls over to an in- Verted position, said panelsterminating at a point substantially midway between the top deck and theinner deck, flood lines mounted upon the inner deck at opposite sides ofthe scow and adjacent to the opposite ends thereof, said flood lineshaving their induction ends above the water line when the scow issubstantially free of load, said 'flood lines having swinging sectionswithin the scow adjustable from a'substantially horizontal position to asubstantially vertical position, and means extending above the top deckfor swinging said sections, said air tanks being aligned lengthwise ofthe scow and positioned substantially at the transverse center thereof,7

3. A self-dumping scow having a top deck and a bottom, an inner deckwithin the scow extending from one end to the other and spaced from thebottom of the scowto position said lower deck slightly above the no-loadwater line of the scow, an upstanding enclosure carried by the top deckto provide a top cargo space, air tanks mounted upon the top deck foreand aft of the enclosure, panels depending from the top deck and spacedfrom the side walls of the scow to provide pockets to catch water as thescow rolls over to an inverted position, said panels terminating at apoint substantially' midway between the top deck and the inner deckflood lines mounted upon the inner deck at opposite sides of the scowand adjacent to the opposite ends thereof, said flood lines having theirinduction ends above the water line when the scow is substantially freeof load, said flood lines having swinging sections within the scowadjustable from a substantially horizontal position to a substantiallyvertical position, a' shaft extending down through the upper deckadjacent to each of the flood lines, means above the deck for rotatingthe shaft, and an operative connection between the lower portion of theshaft and the adjacent swinging section for moving said section from oneposition to another upon rotation of the shaft;

r JOHN KIMBAIL MUNSON.

